WHILE WALKING ACROSS GROUND FLOOR OF MILL BUILDING EE STEPPED ON A MILL BALL THAT WAS UNDER APPROX. 3"" OF DUST ON THE FLOOR. EE DID NOT REQUIEST TO SEE A DR. UNTIL 12-1-00. SUBSEQUENT TESTS RE VEALED NOTHING, HOWEVER HE CONTINUED TO HAVE PAIN, SO A DIAGNOSTIC ARTHROSCOPY WAS SCHEDULED AND PERFORMED ON 2-28-01, WHICH WILL RESULT IN LOST TIME.